Drink-mixing machine.



R. W. PORTMANN.

DRINK MIXING MACHINE.

APPLICATION man oec. 21. 1914.

Ku. 1 OUI. 1 )T l ew u JU E m. s n2 ou P 1,141,358. Tail..

wikuamo R. W. PRTMANN.

DRINK wuxms MACHINE.

APPLICATION FILED DC.2|, |914. 1,141,358. l lntentedJune 1, 1915.

2 SHEETS-SHEET 2.

@ummm annual:

ROY W. PORTMANN, 0F NORWOQD, OHIO.

DRINK-MIXING MACHINE.

Specication of Letters Patent.

Patented J une 1, 19154.

Application filed December 21, 1914. Serial No. 878,334.

in the art to which it appertains to makeand use the same.

This invention relates to agitators and more especially to aerating and mixing machines for beverages such as are served'at soda fountains and similar places.

.The main object of the invention is to provide a simple device of this class in which liquid may be quickly aerated and caused to foam withoutnecessitatiiig any exertion on the part lof the operator.

Another object of the invention is'to provide a device of this character in which the container itself carries the mixing propeller and which is readily detachable from the motor stem or shaft and may be cleaned.

y when placed inoperative position. Thiscoriafter each use thereof.

Another object is to provide -in such a device 'a novel connection between the mo- 7 tor shaft and the propeller stein.

' With these and other ob3ectsiin view, the

invention consists of certain novel features. `0f construction, combination and'arrangement-of parts as will be hereinafter more 3 fully described and claimed.'

4In the accompanying drawings: Figure l' represents a side elevation partly in section showing this improved agitator in operative position Fig. 2 is a horizontal section taken on line 2-2 of Fig. 1; Fig. 3' is a horizontal section taken on the line 3 3 of Fig. 1.

' Fig. 4 isa detail sectional view of the lower. portion of the container and the upper part i of the motor, with the-container disconnected from the motor and arranged` in vjuxtaposition vready for connection withthe mo tor; Fig. 5'is a horizontal'section taken on the'rein.

line 5-5 of Fig. 4'; Fig. 6 is a detailplan tive view of one of the catches.

In the embodiment illustrated a `motor casin 1 is" shown having a motorhoused This casing is provided at its ii'p; per endv with a reduced extensionl 2 to the opposite sides of the inner face.of which are secured two electric switches for conducting'current to the motor and which are here shown in the form of spring arms 3 and 4 secured at one end to the inner wall of the extension 2 of the casing with their free ends disposed in loverlapping planes and which are designed to be forced into contact when the container to be described is applied by means of pivoted catches 5 mounted on the sides of the extension. lVhen' the device is not iii use these catches'swing outwardly under the action of springs 4 into the position shown in Figs. 4 and cause the arms 3 and 4 to separate, the resiliency of the arm 4 causing it to move away from arm 3 and thus disconnect the current from the motor. The motor shaft 6 has a'universal joint 7 which connects said shaft 6 witb.another shaftS mounted in the extension 2 and with which the agitator stem ofthe containeris adaptedto abut when the container is placed. in operative position on the motor.

tainer 10 mav be constructed of'any suitablematerial preferably glass and the bottom 11 thereof is disposed some distance from the z lower end of the container the side walls of 5 and thus l :soV

which below said bottom form an inclosing hood 12 for encircling the extension 2 of the motor when the device is in operative po.- sition as shown in Fig. l. The lower edge of this hood 12 is provided on its inner face withan inwardly projecting rib 13 which is preferably beveled on its lower-face as shown ,at 14 to facilitate its engagement with the .catches 5 when the container 1s.

placed over the extension 2 ofthe motor and which thus forces saidv catches 5 inward, thereby causing the spring arms 4 of the switches to contact withthe arms 3 forfclosing the circuit 'and supplying current to the motor.

The bottom 11 of the container 10 pro vided witha central depression 15 which forms-a chamber for housing the agitating element or fan 16 when the. container is disconnected from the motor as will be hereinafter more fully ing`17 .therein and is preferably provided with a depending collar 18 for a purpose t0 be described.- Slidablymounted in the opendescribed. This housing or chamber 15 has a centrally disposed openand with two laterally extending pins 25 Y ing 17 in the bottom of the 'chamber 15 is a hollow stem or shank 19 to theA upper end of which is fixed the agitating element herein shown in the form of a fan 16 the blades 20 of which are made integral with said shaft 19 and between which the air is designed to be discharged from the shaft 19 when the fan is in motion, said air being drawn up into the shaft through openings 21 adjacent the lower end of said shaft.

Fixed to the fan 16 over the blades thereof is a disk 22 which projects at its periphery beyond the fan blades and is designed to seat over the chamber 15 when the fan is lowered into said chamber for completely closing the chamber and preventing entrance of liquid contained in the container fromentering said chamber.

A sleeve 23 is secured to the lower end of the shaft 19 and is provided with a collar 24 disposed on opposite sides of the sleeveand which are adapted to extend between the wings 8 of the shaft 8 of the motor whereby said agitator is connected with said shaft and is adapted to vbe rotated thereby when the motor is set in operation. A collar 26 encircles the shaft 19 and is spaced there from being adapted to rest on the collai` or' flange 24 carried by the sleeve 23 and against which one end of 'a coiled spring 27, which .encircles the shaft and collar 18abuts.

This coiled. spring 27 thus exerts its tension normally to .force the shaft 19 and the a Y of the shaft 8 of the motor` and the lower end of the shaft 19 of the agitator is de# foo signed to abut against'this wingedvend or motor shaft 8 `when the contain'e'r --10 is placed over theextension 2 and thusforee said shaft 19 u wardly to 16 beyond the ottom 11 o into theposition shown in Fig. 1. When this container is inserted over the motor extension 2 the sleeve 23 and collar-24.- will pass through the opening 2 8 into -the extension 2 and the pins 25 carried by said sleeve will venter between the w`ings 8 ofthe shaft 8 and -tl'iusjoperatively connect the shaft 19 with the motor shaft to provide for therotation of' said shaft 19 by thefi'noto'r when the latter is operated. When the shaft 19 is engaged with the shaft 8 the tension of the -spring 27 will be'transferred from the ``collar 24of thesleeve 23 to collar 26 which rests on, thenupper face of the extension 2 `-"as shown injFig. land when thus-.relieved project the fait the container 1 shaft 8 to position the fan above the bottom 11 as above described. When the fanv is in this position air entering through the openings 21 will pass upwardly through shaft 19 and the rotation of the fan will draw the air up and discharge it into the container 10 and the air so inserted will pass through the contents of the container, thoroughly aerating it and causing it to foam.

The blades 20 of the fan radiate from the center thereof thus producing a multiplicity of air outlets which flare from the centerof the mechanism or agitator 16 outward so as to produce the greatestV amount of vacuum or suction in the hollow shaft 19 with the result that a great amount of -air is forced through the contents of the container thereby thoroughly mixing said contents and aer- I ating it.

From the above description it will be obvious that the insertion of the containerlO over the motorl extension 2 will simultaneously connect theshafts 19 and 8 of the container and motor respectively and 'by forcing in the catches 5 supply currentto the motor whereby the connected sliafts 8 and 19 will be rotated thereby 'rotating the mixer or fan 16 and discharging air in all directions therefrom into the container. When the catches 5 are forced in the springs 3 and- 14 bearing against each other at their inner' ends willcause said catches to frictionally engage the container 10 an' hold it in posin -tion `while theA machine ,is in operation.

When the .container is -removed 'the springs 3 and 4 force the catches l5 voutwardly tothe positionshown inv Figs. 4 and 5 and contact etween said springs is disconnected thereby stopping the motor. At the'same instant the spring 27 von the container forces thecollar 26 into engagement with the collar 24 on the sleevej 23 and thus retracts'the agitator and the disk secured to it.

I claim as my invention:

1. In a* device ofthe class describedthe combination of a container having a bottom disposedinwardl'y some distance from'its lower edge, said bottom having a recess A therein `with an opening throughits lower wa1l,an agitator normally 'housed in said recess, and having a stem extending :through the openingtherein, a driving element and Veoperating.means .on vsaid stem and driving element 'for -fdetachablyv connecting them, and means whereby when'said'stein undelement are connected the agitator will be projected above said recess. -v

2. Ina device of the lclass described the combination ofa container having a bottom disposed inwardlv someA distance fromv v'its lower edge,l said bottom Yhaving a recess .therein with an V opening throughits'flower wall, an agitator/normally housed insaid recess and having a stem extending through the opening therein, a drivingeleinent, and

LMLBS coperating means o n said stem and driving element for detachably connecting them, and coperating means carried by said container and driving element for connecting the lat,- ter with an electric current.

3. In a device of the class described the combination of a container having an opening in its bottom, an agitator mounted said container and having a stem extending through said opening, a laterally extending collar carried by said stem, a coiled spring encircling said stem and bearing on said collar, a motor having a driving shaft and means for connecting said stem and shaft whereby the agitator is relieved from the tension of said spring.

4. In a device of the class described, a container having its bottom wall spaced inwardly from its lower edge, a depression in said bottom having an opening through its lower wall, a depending collar surrounding said opening, an agitator mounted in said container and having a stem extending through the opening in the bottom wall of said recess, said agitator being normally housed in said recess and provided with means for closing the recess when so housed, a driving element jected shaft, means for disengageably uniting said shaft and stem, a coiled spring encircling the collar around said opening, a vertically movable collar carried by said stem against which said spring bears which adapts it to retract the agitator within said recess, and means for rrelieving said stem from the tension of said spring o erable on the connection of said stem and s aft.

5. In a device of the class described a container having its bottom wall spaced inwardly from its lower edge, a depression in said bottom having an opening through its lower'wall, a depending collar surrounding said opening, an agitator mounted in said container and having a stem extending through the opening in the bottom wall of said recess, said agitator being normally housed in said recess and provided with means for closing the recess when so housed, a driving element having an upwardly projected shaft, means for disengageably uniting said shaft and stem, a coiled spring encircling the collar `around said opening, a vertically movable collar carried by said stem against which said spring bears which adapts it to retract the agitator within said recess, a collar loosely carried by said stem and means for discngaging said collar from the stem when said stem and shaft are connected.

6. A device of the class described comprising a container having a recess in its bottm with an opening extending through the lower wall of said recess, an agitator normally mounted in said recess and having a disk secured to its upper face for closing having an upwardly pro- .t

said recess when said agitator is disposed therein, a stem extending from said agitator through the opening in said recess, a sleeve carried by said stem and having a laterally extending collar thereon, loosely encircling said sleeve and normally resting on the collar thereof, a coiled spring encircling said stem and engaging the lower wall of said recess at one end and said movable collar at its other end, and means for detachably connecting said sleeve with the driven element.

LA device of the class described comprismg a container having a recess in its ottom with an opening extendingthrough the lower wall of said recess, an agitator normally mounted in said recess and having a disk secured to its upper face for closmg said recess when said agitator is disposed therein, a stem extending from said agitator through the opening in said recess, a sleeve carried by said stem and having a laterally extending collar thereon, another collar loosely encircling said sleeve and normally resting on the collar thereof, a coiled spring encircling said stem and engaging the lower wall of said recess at one end and said movable collar at its other end, a motor having a shaft for detachable engagement with said stem, an electric switch connected with said motor, a catch for closing said switch, and means carried by the container for actuating said catch.

t5. A device of the class described comprlsing a container having a recess in its bottom with an opening extending through the lower wall of said recess, an agitator normally mounted in said recess and having a disk secured to its upper face for closing said recess whenV said agitator isdisposed therein, a stem extending from said agitator through the opening in said recess, a sleeve carried by said stem and having a laterally extending collar thereon, another collar loosely encircling said sleeve and normally resting on the collar thereof, a coiled spring encircling said stem and engaging the lower wall of said recess at one end and said movable collar at its other end, a motor having a shaft for detachable engagement with said stem, an electric switch connectedwith said motor, a catch for closing said switch, said container having means for engaging said catch wherebythe switch is closed and the container held in engagement with said motor.

9. In a device of the class described, the combination with a motor casing having a reduced extension on its upper end, a driving shaft extending through said extension and having its outer end Winged; of a container having an agitator mounted therein and provided with a stem extending through the bottom of said container, said stem and motor shaft having coperating means for another collar detachably .connecting them, the stem' of In testimony whereof I have hereunto set said agitator being hollow, means for supmy hund in presence of two subscribing Witplying air kto said hollow stem, and copnesses.

erating means carried by said extension and ROY W. PORTMANN. 5 container for yieldably holding said con- Witnesses:

tainer in operative position on said exten- ALBERT H. PETERS,

sion. HENRY H. PORTMANN. 

